A slide-type self-ligating orthodontic bracket assembly, comprising:
- a bracket body block (10) including a base portion (11) configured to be attached to the surface of a tooth, and a body portion (12) formed on the base portion 11 and provided with a wire slot (120), into which the arch wire (W) is inserted, between a first wall (130) and a second wall (140);
- a cover block (20) configured to slide between an open position for opening the wire slot (120) and a closed position for closing the wire slot (120);
- and
- a restraining unit configured to restrain the cover block (20) in the closed position and the open position;
- wherein a guide protrusion (132), both sides of which are flat surfaces parallel to each other, is formed on a flat top surface of the first wall (130);
- wherein a guide recess (22), into which the guide protrusion (132) is inserted to slide forward and backward, is formed through a bottom surface of the cover block (20);
- wherein the restraining unit comprises:
- a tubular spring pin (40) inserted and fixed into the pin insertion hole (139) formed to a certain depth from the flat top surface of the guide protrusion (132), and configured to be elastically deformed or elastically restored in order to contract or extend in the radial direction;
- and
- a restraint ring (50) made of metal, inserted and fixed into a fixing groove (222) formed on a ceiling surface inside the guide recess (22), and configured to restrain the cover block (20) in the open position and the closed position while operating in conjunction with the tubular spring pin (40);
- and
- wherein the restraint ring (50) comprises:
- a straight guide groove (52) configured to guide the tubular spring pin (40) through straight sliding in a state in which an end of the tubular spring pin (40) contracted radially upward is fitted into the straight guide groove (52);
- a first restraint groove (54) provided at one end of the straight guide portion (52) to have an inner diameter larger than a width of the straight guide groove portion (52), and configured to restrain movement of the cover block (20) in a closed position in a state in which an end of the tubular spring pin (40) extended in the radial direction is inserted into the first restraint groove (54);
- and a second restraint groove (56) provided at a remaining end of the straight guide portion (52) to have an inner diameter larger than the width of the straight guide groove portion (52), and configured to restrain movement of the cover block (20) in an open position in a state in which an end of the tubular spring pin (40) extended in the radial direction is inserted into the second restraint groove (56).